Use C language recursion and non-recursion to implement the string inversion function char * reverse (char * str)

The Code is as follows:

Copy codeThe Code is as follows: // Recursive string Inversion
Char * reverse (char * str)
{
If (! Str)
{
Return NULL;
}

Int len = strlen (str );
If (len> 1)
{
Char ctemp = str [0];
Str [0] = str [len-1];
Str [len-1] = '/0'; // The last character will not be processed at next Recursion
Reverse (str + 1); // recursive call
Str [len-1] = ctemp;
}

Return str;
}

// Non-recursive string Inversion
Char * reverse (char * str)
{
If (! Str)
{
Return NULL;
}

Int len = strlen (str );
Char temp;
For (int I = 0; I <len/2; I ++)
{
// Exchange the characters at the first and second locations
Temp = * (str + I );
* (Str + I) = * (str + len-1-I );
* (Str + len-1-I) = temp;
}

Return str;
}
Int _ tmain (int argc, _ TCHAR * argv [])
{
Char src [] = {"abcdef "};
Char * pdest = reverse (src );
Getchar ();
Return 0;
}